strlcpy.c - smdev - suckless mdev | |
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strlcpy.c (1508B) | |
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1 /* | |
2 * Copyright (c) 1998 Todd C. Miller <[email protected]> | |
3 * | |
4 * Permission to use, copy, modify, and distribute this software for any | |
5 * purpose with or without fee is hereby granted, provided that the above | |
6 * copyright notice and this permission notice appear in all copies. | |
7 * | |
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANT… | |
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE F… | |
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT … | |
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 */ | |
16 | |
17 #include <sys/types.h> | |
18 #include <string.h> | |
19 #include "../util.h" | |
20 | |
21 /* | |
22 * Copy src to string dst of size siz. At most siz-1 characters | |
23 * will be copied. Always NUL terminates (unless siz == 0). | |
24 * Returns strlen(src); if retval >= siz, truncation occurred. | |
25 */ | |
26 size_t | |
27 strlcpy(char *dst, const char *src, size_t siz) | |
28 { | |
29 char *d = dst; | |
30 const char *s = src; | |
31 size_t n = siz; | |
32 /* Copy as many bytes as will fit */ | |
33 if (n != 0) { | |
34 while (--n != 0) { | |
35 if ((*d++ = *s++) == '\0') | |
36 break; | |
37 } | |
38 } | |
39 /* Not enough room in dst, add NUL and traverse rest of src */ | |
40 if (n == 0) { | |
41 if (siz != 0) | |
42 *d = '\0'; /* NUL-terminate dst */ | |
43 while (*s++) | |
44 ; | |
45 } | |
46 return(s - src - 1); /* count does not include NUL */ | |
47 } |